CN202563039U - Earth fault indicating device - Google Patents
Earth fault indicating device Download PDFInfo
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- CN202563039U CN202563039U CN2012201843078U CN201220184307U CN202563039U CN 202563039 U CN202563039 U CN 202563039U CN 2012201843078 U CN2012201843078 U CN 2012201843078U CN 201220184307 U CN201220184307 U CN 201220184307U CN 202563039 U CN202563039 U CN 202563039U
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- indicating device
- earth fault
- fault indicating
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Abstract
Provided is an earth fault indicating device. The earth fault indicating device is installed between an upper pole and a lower pole of a positive (P) pole of a circuit breaker or an earth leakage protection device in parallel, and the earth circuit breaker or the earth leakage protection device is used in a power supply circuit in electric equipment. The earth fault indicating device comprises a resistor, an indicating component and an automatic reset button, and the resistor, the indicating component and the automatic reset button are connected in series. Under normal operation condition of the electric equipment, the automatic reset button is not pressed down, and at the moment an electrical pathway between the earth fault indicating device and the electric equipment is not formed. When the circuit breaker trips caused by a breakdown of the electric equipment, the automatic reset button is pressed down, and at the moment the electrical pathway between the earth fault indicating device and the electric equipment is formed. After tripping of the circuit breaker caused by the breakdown of the electric equipment is processed, the automatic reset button is pressed down again before the circuit breaker is switched on, and at the moment the electrical pathway between the earth fault indicating device and the electric equipment is switched on.
Description
Technical field
The utility model relates to a kind of earth fault indicating device, particularly a kind of earth fault indicating device that is used for isolating switch or earth leakage protective device.
Background technology
Electricity consumption place in family, public place and industrial and mining enterprises all is equipped with all kinds of isolating switchs and earth leakage protective device, and its effect is for consumer, circuit and personal safety are shielded.In case electric fault (wherein being earth fault more than 70%) takes place, and these isolating switchs will trip, to cut off the electricity consumption loop.This moment, correct flow should be: check fault, fix a breakdown, isolating switch reclosing continued is used.But an isolating switch is often being controlled several consumers, and being difficult to judge is that which platform or which platform equipment have fault.Even have only a consumer, whether get rid of (for example motor makes moist and causes the leak current fault of major loop to motor housing) fully through also being difficult to failure judgement behind the simplified overhauling sometimes.These situation just become more difficult when lacking professional instrument judges, especially in the family.At this moment, people are faced with two selections, the first, with the part that might break down comprise that all electrical appliances, all circuits, all protective devices and control or surveillance equipment check with professional checkout equipment.Second selection; Handle directly reclosing isolating switch of back at certain doubtful out of order equipment of disconnection or to it exactly; But this can not confirm fault 100% eliminating after all; So it is the danger that have tape jam to close a floodgate this moment gently then influences the isolating switch life-span, heavy then operator and equipment are had security threat.And first kind of selection often can not be used again owing to too time-consuming.
Professional earth fault indicating device cost on the market is very high, impossible widespread adoption, and also in some fairly simple distribution systems (like domestic system), it is not too practical that its many functions seem.For example measure harmonic wave, measure the distance of fault generation etc.Therefore generally the having only protection and isolation features of common circuit breaker and earth leakage protective device, especially family expenses and do not have the earth fault deixis.
The utility model content
According to the device of the utility model after isolating switch or the tripping operation of earth leakage protective device generation earth fault; A kind of very easy and indicating fault intuitively is provided; Can show very accurately whether earth fault is excluded, thereby avoid danger isolating switch or earth leakage protective device tape jam combined floodgate.
An aspect according to the utility model provides a kind of earth fault indicating device; Said earth fault indicating device is in parallel installed with up and down between the utmost point of the P utmost point of employed isolating switch in the current supply circuit of consumer, and said earth fault indicating device comprises resistance, the indicator elment that is connected in series and the button that resets certainly; Under the normal operating conditions of said consumer, the said button that resets certainly is not pressed, and this moment, said earth fault indicating device and said consumer did not form electric pathway; When said consumer break down cause said circuit breaker trip after, press said from the button that resets, this moment said earth fault indicating device with said consumer formation electric pathway; After caused circuit breaker trip that said consumer is broken down disposes, before said isolating switch being carried out reclosing, press said once more from resetting button, said earth fault indicating device and said consumer formation this moment electric pathway.
Another aspect according to the utility model provides a kind of earth fault indicating device; Said earth fault indicating device is in parallel installed with up and down between the utmost point of the P utmost point of employed earth leakage protective device in the current supply circuit of consumer, and said earth fault indicating device comprises resistance, the indicator elment that is connected in series and the button that resets certainly; Under the normal operating conditions of said consumer, the said button that resets certainly is not pressed, and this moment, said earth fault indicating device and said consumer did not form electric pathway; When said consumer break down cause the tripping operation of said earth leakage protective device after, press said from resetting button, this moment said earth fault indicating device with said consumer formation electric pathway; After caused earth leakage protective device tripping operation that said consumer is broken down disposes; Before said earth leakage protective device being carried out reclosing, press said once more from resetting button, said earth fault indicating device and said consumer formation this moment electric pathway.
Said resistance is below 25k Ω.
Said indicator elment can be a light emitting diode.Certainly it will be appreciated by persons skilled in the art that said indicator elment also can be other parts of realizing deixis through modes such as sound, vibrations.
From practical standpoint, the utility model brings the user new function with less cost.Only need three basic elements just can realize.The volume of element is very little, and is easy to connect, and being integrated into the protective device device interior can not have big influence to its structure.If select SMD divider resistance and indicator elment for use, even be integrated into miniature circuit breaker and earth leakage protective device inside is also very convenient.Owing to installed the button that resets certainly additional, dielectric properties, interrupting performance and the isolation features of protective device all not have to influence.The scope of application of this device is very wide; Little leak current fault to 10mA; Can indicate and need not to change element exactly to the ground short circuit fault of tens kA greatly; Owing to simple in structure, in the harsh and unforgiving environments of high temperature, high humility and high height above sea level, also can normally use simultaneously, can not influence its serviceable life.
The utility model has solved isolating switch or earth leakage protective device tripping operation after the generation earth fault in the distribution system, is difficult to the problem whether failure judgement still exists after treatment.
So far, for the detailed description of the utility model at this can be better understood, and for the contribution of the utility model to prior art can be realized better, the disclosure has been summarized the content of the utility model quite widely.Certainly, the theme of accompanying claims will described and will form to the embodiment of the utility model below.
Likewise, those skilled in the art will recognize that, the disclosure based on design can be easily as the basis of other structure of design, method and system, be used to implement several purposes of the utility model.Therefore, importantly, accompanying claims will be understood that and comprises such equivalent structure, as long as they do not exceed the essence and the scope of the utility model.
Description of drawings
To better understanding be arranged to the utility model through following accompanying drawing those skilled in the art, and more can clearly embody the advantage of the utility model.Accompanying drawing described herein has been merely the illustration purpose of selected embodiment, rather than all possible embodiment and be intended to not limit the scope of the utility model.
The synoptic diagram of Fig. 1 illustrates a kind of earth fault indicating device that is used for isolating switch or earth leakage protective device according to the utility model.
Embodiment
Before at least one embodiment of illustrated in detail the utility model, should be appreciated that the utility model is not restricted to the details and the configuration of components of proposition in the following description or structure illustrated in the accompanying drawings in its application.The utility model can have except describe those embodiment, and can implement by different way and carry out.Moreover, should be appreciated that at the wording of this employing and term and summary be for purpose of description, should not think determinate.
The utility model can use on the multiple isolating switch of multiple systems or earth leakage protective device, below a P+N type isolating switch in above Haiti district TT system commonly used be that example describes.
As shown in Figure 1, in the current supply circuit of a single-phase electric devices 1, use a P+N type isolating switch 2, it the P utmost point up and down between the utmost point parallel connection comprise the resistance 3-1, the indicator elment 3-2 that are connected in series and the earth fault indicating device 3 of the button 3-3 that resets certainly.When consumer 1 break down cause isolating switch 2 tripping operation after, press from resetting button 3-3, if indicator elment 3-2 lights, what generation be described is earth fault rather than phase fault or other fault.Can handle earth fault targetedly this moment.After disposing, before isolating switch 2 is closed a floodgate again, press the button 3-3 that resets certainly once more and whether really be excluded with validation fault.If indicator elment 3-2 is lighted once more, explain that fault still exists or has other fault to exist, isolating switch 2 can't close a floodgate.If indicator elment 3-2 does not work, explain that fault is excluded, can relieved isolating switch 2 be closed a floodgate again.
Because the working current of common indicator elment is between 5mA to 20mA, thus the utility model for fault resstance below 25k Ω, promptly under the power-frequency voltage leak current fault electric current of 10mA above (containing) until metal ground short circuit fault current all can accurately indicate.If itself have for example voltage measuring apparatus etc. of the grounding apparatus of some resistances below 25k Ω in the loop, should the back take place in fault throw off in advance, to avoid the situation of wrong report.Even need to prove and do not use the utility model and use miscellaneous equipment such as Insulation Resistance Tester inspection faults such as (meggers) need to throw off grounding apparatus yet, so the utility model does not increase workload artificially.Simultaneously, because a lot of consumer itself is a low resistive state, other checkout equipment (megger, multimeter etc.) can't detect phase fault too exactly, so this can not be the defective of the utility model.
Said indicator elment can be a light emitting diode.Certainly it will be appreciated by persons skilled in the art that said indicator elment also can be other parts of realizing deixis through modes such as sound, vibrations.
It is inner that the utility model can be integrated into protective device electrical equipment with very low cost, also can be made into modular annex and supply client's apolegamy.
The utility model can be used on the equipment such as the various isolating switchs, earth leakage protective device in the common distribution system; Even in the IT system of isolated neutral, also can play a role, those skilled in the art can easily implement through the understanding to above-mentioned embodiment.
With reference to specific embodiment; Although the utility model is illustrated in instructions and accompanying drawing; But be to be understood that; Under the situation of the utility model scope that does not break away from the claim to be limited, affiliated person skilled can be made multiple change and the alternative wherein multiple element of multiple equivalent.And; The combination of the technical characterictic among this paper between the specific embodiment, element and/or function and collocation are clear distinct; Therefore according to these disclosed contents; Technical characterictic, element and/or function that affiliated person skilled can figure out among the embodiment can be incorporated in another specific embodiment according to circumstances, only if foregoing has other description.In addition, according to the instruction of the utility model, the scope not breaking away from the utility model essence adapts to special situation or material and can make many changes.Therefore; The utility model is not limited to graphic other specific embodiment of accompanying drawing institute; And the conduct described in the instructions is at present for implementing the specific embodiment of the contemplated preferred forms of the utility model, and the utility model intention comprises all embodiments that fall in above-mentioned instructions and the appended claim scope.
Claims (10)
1. earth fault indicating device is characterized in that:
Said earth fault indicating device is in parallel installed with up and down between the utmost point of the P utmost point of employed isolating switch in the current supply circuit of consumer, and said earth fault indicating device comprises resistance, the indicator elment that is connected in series and the button that resets certainly;
Under the normal operating conditions of said consumer, the said button that resets certainly is not pressed, and this moment, said earth fault indicating device and said consumer did not form electric pathway;
When said consumer break down cause said circuit breaker trip after, press said from the button that resets, this moment said earth fault indicating device with said consumer formation electric pathway;
After caused circuit breaker trip that said consumer is broken down disposes, before said isolating switch being carried out reclosing, press said once more from resetting button, said earth fault indicating device and said consumer formation this moment electric pathway.
2. earth fault indicating device according to claim 1 is characterized in that:
Said resistance is below 25k Ω.
3. earth fault indicating device according to claim 1 is characterized in that:
Said indicator elment is a light emitting diode.
4. earth fault indicating device according to claim 1 is characterized in that:
Said indicator elment is can sonorific parts.
5. earth fault indicating device according to claim 1 is characterized in that:
Said indicator elment is can vibrative parts.
6. earth fault indicating device is characterized in that:
Said earth fault indicating device is in parallel installed with up and down between the utmost point of the P utmost point of employed earth leakage protective device in the current supply circuit of consumer, and said earth fault indicating device comprises resistance, the indicator elment that is connected in series and the button that resets certainly;
Under the normal operating conditions of said consumer, the said button that resets certainly is not pressed, and this moment, said earth fault indicating device and said consumer did not form electric pathway;
When said consumer break down cause the tripping operation of said earth leakage protective device after, press said from resetting button, this moment said earth fault indicating device with said consumer formation electric pathway;
After caused earth leakage protective device tripping operation that said consumer is broken down disposes; Before said earth leakage protective device being carried out reclosing, press said once more from resetting button, said earth fault indicating device and said consumer formation this moment electric pathway.
7. earth fault indicating device according to claim 6 is characterized in that:
Said resistance is below 25k Ω.
8. earth fault indicating device according to claim 6 is characterized in that:
Said indicator elment is a light emitting diode.
9. earth fault indicating device according to claim 6 is characterized in that:
Said indicator elment is can sonorific parts.
10. earth fault indicating device according to claim 6 is characterized in that:
Said indicator elment is can vibrative parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201843078U CN202563039U (en) | 2012-04-26 | 2012-04-26 | Earth fault indicating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201843078U CN202563039U (en) | 2012-04-26 | 2012-04-26 | Earth fault indicating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202563039U true CN202563039U (en) | 2012-11-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201843078U Expired - Lifetime CN202563039U (en) | 2012-04-26 | 2012-04-26 | Earth fault indicating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202563039U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105759160A (en) * | 2016-05-11 | 2016-07-13 | 郑州瑞能电气有限公司 | Online monitoring method of non-invasive line breaker or transformer |
-
2012
- 2012-04-26 CN CN2012201843078U patent/CN202563039U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105759160A (en) * | 2016-05-11 | 2016-07-13 | 郑州瑞能电气有限公司 | Online monitoring method of non-invasive line breaker or transformer |
| CN105759160B (en) * | 2016-05-11 | 2019-01-25 | 郑州瑞能电气有限公司 | A kind of non-intruding line-breaker or transformer online monitoring method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121128 |
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| CX01 | Expiry of patent term |